Home / 8,185.86-12,278.81-2,639.61

Finding the Fourth Proportional to 8,185.86, 12,278.81 and 2,639.61

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Solution

The fourth proportional to 8,185.86, 12,278.81 and 2,639.61 is: 3,959.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,185.86 : 12,278.81 = 2,639.61 : x
  2. Step 2: Convert to fraction form
    8,185.86/12,278.81 = 2,639.61/x
  3. Step 3: Cross multiply
    8,185.86x = 12,278.81 × 2,639.61
  4. Step 4: Simplify right side
    8,185.86x = 32,411,269.66
  5. Step 5: Solve for x
    x = 32,411,269.66/8,185.86
  6. Step 6: Final answer
    x = 3,959.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.